in this video marcus talks about using commission junction as a supplementary affiliate network… most of the money he makes is with CPA affiliate programs but occasionally he will use something like CJ to promote a direct offer.
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this video will also show you some of the niches, offers, and even his profiable font site where he got font sales for $600 a pop.
remember the results are not typical, implied, or guaranteed, marcus has been doing this for 20 years so you should not expect to set up one site and make millions… most people never make anything and some even lose money.
but i think this conmission junction tutorial will help you see how its done.